add slots based on assumed x and y offset, rename for compatability w/old api
add slots based on assumed x and y offset, rename for compatability w/old api

OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons-api,Opentrons/labware,OpenTrons/opentrons-api,OpenTrons/opentrons-api,OpenTrons/opentrons_sdk